AM_Boromuscovite_1 Formula: Al.82 (Si3 B) K.2 (O12 H2) Name: Boromuscovite Unit cell: 5.102 8.788 10.076 90.0 101.23 90.0 , V=443.12 Space group: C12/M1 (12)

Liang J , Hawthorne F C , Novak M , Cerny P , The Canadian Mineralogist , 33 (1995) p.859-865, Crystal-structure refinement of boromuscovite polytypes using a coupled, Rietveld-static-structure energy-minimization method, Sample: 1M polytype, Locality: Recice, Czech Republic